Burglar-alarm system.



S. D. TOMASO.

BURGLAR ALARM SYSTEM.

APPLICATION FILED MAR. 26. I9I5.

Igwm. Paten-fed 001. 19, 1915.

2 SHEETS-SHEET I.

Grifo: "uw

, s. D. TOMASO.

BURGLAR ALARM SYSTEM.

APPLICATION FILED MAR. 26, l9l5.

Lwwm, Patented oct. 19, 1915.

2 SHEETS-SHEET 2.

" ran sfrai'rns rarnnr ernia.

snLvaroan n. TOMASO, or CHICAGO, ILLINoIs, Assistme or own-nam" ro 4.nonLn'r n.

HULSMAN, or CHICAGO, InLnaoIs.

To all whom t may concern:

Be it known that I, SALVATORE D. TOMASO, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful improvements in Burglar-Alarm Systems, of which thefollowing is a speciielectric circuits and switches whereby thel operation ontn the system is controlled, and also to provide novel kand improved actuating means for the talking machine.

f Other objects and advantages of the invention will be pointed-Out in the detailed description appearing hereinafter, `and in order that the invention may be better understood, refenence isvhad to the accompanying drawings, in which- Figure 1 is an elevation of the apparatus; Fig. 2 is a horizon-tal section on the line.

'2--2 of Fig. 1; Fig. 3 is an inverted horizontal section on the line 3-3 of Fig'. 1 and the protectiveA circuit shown` diagrammatically; Fig. 4 is a cross-section on the line Lt-a oit Fig. 2, and Fig. 5, is a cross-section on the line 5--5 of Fig. 3.; 1

Referring specifically to the drawings, 5 denotes a door and 6 a window of the house in which the system is installed. ln the house is located a telephone, the transmitter of which is shown at7, the same being mounted ina box 8 placed at any convenient location in' the house. The box isprovided with a suitable fclosure 9, and it contains two shelves V10 and 11, respectively, the transmitter being mounted on the top shelf 10. On the bottomshelf 11 is mounted a talking machine having a record cylinder 12 and a sound boX 13, to which latter is connected -a horn 14 arranged to conduct to the transmitter the sound waves from the record cylinder, so that when the telephone circuit is closed and the talking machine is Started,v an alarm is sent outover the line. The record cylinder contains the message to Specification of Letters Patent.

der 12.

Patented ct'. 319, 1915.

Application led March 26,y 1915. yderlei No. 17,155.

be sent, which will be a call for central to make connection with police and afcall for police assistance, together with the location of the house; or the telephOnema-y be connected directly with polie/e headquarters.

The following means are provided for operating the talking machine: The sound box 13 is carried by an arm 15 extending from a carriage 16 slidably mounted on a shaft 17. From the carriage also extend two arms 18 and 19, respectively. The arm 18 has a nut 20' at its outer end whichfengage's the threads of a feed' screw 21 extending parallel to the shaft 17. The `feed screw has a mandrel 22 which carries the record cylin- Thus, when the feed-screw is in motion, the stylus of the sound box travels lengthwise of the record cylinder and the latter also rotates. This construction and operation Aof the talking machine is the same as 'that of an ordinary Edison phonograph.

lln order that the message may be repeated, a second feed-screw 23 is provided whichv `connection between the. same is provided,y

which `may be intermeshing pinions 24 and 25 on the respective feed-screws. The arm l 19 has pivoted 'to its outer end., as indicated at 26, a finger 27, the tree end of which is shaped to engage the threads of the feed-f screw 23. Thisnger is not inengag-ement` with the threads ont the feed-screw 23 when,

the carriage 16 is being fed forward, but hangs down in front of said steed-screw, and at the end of 'the forward movement of the carriage the linger is automatically engaged with the threads 'of the feed-screw 23 to returnthe carriage. To eect this automatic engagement of the nger, there is mounted on the feed-screw 23, 'to turn therewith, a disk 28 having a stud 29 projecting from its face-'The disk is so located that when the carriage is at the end of its forward movement the stud strikes -ashoulder 30 on one side of the linger, thus llifting the same, and also the arm 19, and when the stud clears 'the shoulder, the arm and the finger drop, the latter dropping down to' engage the threads of the feed-screw 23. rllhe carriage 16 is free to rock on the shaft 17, in view of which the upward swingkoi' the arm 19 rocks the carriage in a direction to swing the arm l? Fig. 4, and at the same time the nut drops 5 the threads of the feed-screw 23, and theinut 20 being disconnected from thefeed-screw 21, the carriage 16 and the parts carried thereby, willbe returned to starting position. The threads ofthe two4 feed-screws run` in the same direction, but rotation is in opposite directions. At the end of the return movement of the carriage, the linger.

27 comes opposite a reduced'unthreaded portion 31 of the feed-screw 23 and drops down to inoperative position, as shown in down into engagement with the feed-screw 21, and the forward movement/ of the carriage again starts. 1n this manner .the message on the record cylinder is repeated until the machine is stopped. 1n the path of the lfree end of the arm 19, at the reduced portion 31 of the feed-screw 23, is a spring finger 32 which is struck by said arm at the end of its forward travel, and thus absorbs the lateral shock.

The talking machine is driven by an elctric motor 33 having a reducing belt or other driving. connection 34 with the feed-screw 21. of the shelf 11 in the box 8, a suitable insulation 35 being provided. The shaft36 of the motor 33 also actuates a switch which controls the telephone circuit and the cir,-l cuit of the motor. This switch comprises a series of contact points 37 located opposite contact strips 38 and normally spaced therefrom, so that said. circuits are normally open. On the motor shaft is fast a pinion 40 39 which'isin mesh with a gear wheel 40 'loosely mounted on the reduced end 41 of a rod 42 carrying at itsopposite end a bar 43 of insulation, which latter, in turn, .carries 'the contact points 37. On the bottom of the shelf 11 is mountedand suitably insulated therefrom, as indicated at44, a bracket 45 carrying a tube 46 through which the rod 42 loosely passes. In the end of the tube which is ad]acent to the gear wheel 40 are diametrically opposite recesses 47, and on the back of the hub of said gear wheel are lugs 48 adapted to enter said recesses. When the lugs come in line with the recesses, the rod' 42 is advanced by a spring 49 housed in the tube 46 and bearing against an abutment 50 on the rod. This' movement of the rod brings the contact points 37 against th contact strips 38 to close the circuits controlled by the same.

The gear wheel 40 is normally in mesh with the pinion 39, in which position ofthe former, the rod 42 is held retracted and the contacts 37 and 38 are separated. The rod is/ held in this position by turning the gear The motor is mounted on the bottom of the tube 46. If now the motor 33 starts, the gear wheel is rotated, and when the lugs come in line with the recesses 47, they enter the same, the rod being advanced by the spring 49 as hereinbefore described.

The contact strips 38 are mounted on the bottom of the shelf 11 and insulated therefrom by the insulation 44, and they are provided with binding posts. The contact points 37 also'havebinding posts. lOne of the contacty points 37 is wired to a binding post 51, and the opposite contact strip 38 is A wired to a binding post 52. These binding posts are mounted on one of the walls of the box 8, said wall also carrying other-binding posts 53,to which the remaining Contact posts and strips are wired. The wires of the telephone circuit are connected to the binding posts 53. A

vTo the binding posts 51 and 52 is connected the wiring of the protective circuit.

This wiring comprises a conductor 54 connected to the binding post 51 and a conductor 55 connected to the binding post 52. `At the doors, windows and other entrances to the house these conductors have cross connections 56 in parallel, the saine being so connected to the doors, windows and other parts that the protective circuit is open when the doors, etc., are properly closed, the opening of the doors or other partsresulting in the circuit being closed. 1t will therefore be seen that the protective circuit is norl mally open.

From the binding post 51 a conductor 57 leads to one side of the motor 33, and from the binding post-52a conductor 58 leads to the other side of the motor. The motor circuit includes a, suitable source 59 of electric energy. The wiring between the binding post 51 andits corresponding contact point 37 is indicated at 60, and the wiring between'the binding post 52 and the contact' strip 38 opposite said contact point is indicated at 61. In the conductor 57 is interposed a switch 62.

The system operates as follows: The protective circuit is normally open, and as the circuit of the motor 33 is connected thereto, the motor is also normally inoperative, and the circuits controlled by the motoractu ated switch are open. If now the protective circuit is closed by zin-intruderl opening a window, or in any other .way attemptingto enter the house through an entrance which is wired by the protective circuit, the motor circuit is also closed and the motor starts,

whereupon the telephone circuit is closed and the talking machine is started as hereinbefore described. The circuit 'ma-y be traced as follows: from one side of motor by conductor 57 to binding post 51, conductor- 54, cross connection 56 at the window or other place where the entrance is attempted, conductor 55, binding post 52, and conduciaaaeoi tor 58 to the other side of the motor. lf the intrudery should close the `window or otherwise again open the protective circuit, the motor circuit will not be opened and,

the motor will continue to'operate the talking machine for the reason that when the motor started and the telephone circuit was closed, the contact post 37 of the wire 60 and the contact strip 38 of the wire 61 were also brought together. Hence, if thje protective circuit were opened, the motor circuit would remain closed, the circuit being now from one side of the motor by conductor 57 to binding post 5l, conductor 60 to contact point 2??, contact strip '38, conductor 61, binding post 52, and by conductor .58 back to the other side of the motor. rllllie alarm will therefore be given if the intruder should abandon the first attempt and seek another entrance. As the system operates on a normally open circuit., no current is consumed while the system is idle.

li claim: 1. The combination of an .alarm mechanism including an electric signal circuit, an

electric motor for actuating said mechanism, a switch controlling the signal circuit, and means operated by the motor for closing said switch, said means comprising a reciprocatory rod connected to the switch, a gear wheel loose on the rod, said gear wheelhaving a stud, a stationary member having a recess located opposite the stud, and apinion on the motor shaft in mesh with the gear wheel wheny the stud of the latter is outside the recess, said gear wheel dropping out of mesh when the stud registers with and envcuit for the motor, said circuit being connected to the protective circuit, a switch having connections with the energizing circuit for holding said circuit closed after the protective circuit is closed and thereafter opened, and means operatedby the motor for controlling the aforesaid switches..

3.. An electric burglar alarm system comprising a telephone circuit, a talking m21-,

chine the sound waves of which lare conducted into the transmitter of the telephone, a switch controlling the telephone circuit,

. an electric mo-tor operatively connected to the talking machine, a normally open pro tective circuit, an energizing circuit for the motor, said circuit being connected to the protective circuit, a switch having connections with the energizing circuit for holding said circuit closed after the protective circuit is closed and thereafter opened, and means operated by the motor for controlling the aforesaid switches.

In testimony whereof ll alix my signature in presence of two witnesses.

SALVATORE D. TOMASO.

Witnesses:

S. J. LEHRER, H. Gr. BAToHELoR. 

